Is John Brown Truly a Martyr or a Murderer?

In my opinion I think John Brown is a martyr, in the year of 1859 in Harpers Ferry, he says he will not stop to abolish slavery and believes he’s fighting in a holy war. A martyr means a person who is killed because of their religious beliefs. This is exactly what John Brown thought, he believed that slavery was wrong and would stop at nothing until slavery was abolished. He isn’t a murderer since he didn’t kill for no cause but he killed for his own beliefs, and was willing to die for their cause. He was considered a martyr in the North because they know slavery was wrong, while the South considered him as a murderer, but the south back then thought their was nothing wrong with slavery. This is why I think John Brown is a martyr instead of a murderer.